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Magnetotactic bacterial abundance in pelagic marine environments is limited by organic carbon flux and availability of dissolved iron

Roberts, Andrew; Florindo, Fabio; Villa, Giuliana; Chang, Liao; Jovane, Luigi; Bohaty, S; Larrasoaña, Juan C.; Heslop, David; Fitz Gerald, John


Magnetotactic bacteria intracellularly biomineralize magnetite of an ideal grain size for recording palaeomagnetic signals. However, bacterial magnetite has only been reported in a few pre-Quaternary records because progressive burial into anoxic diagenetic environments causes its dissolution. Deep-sea carbonate sequences provide optimal environments for preserving bacterial magnetite due to low rates of organic carbon burial and expanded pore-water redox zonations. Such sequences often do not...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
Source: Earth and Planetary Science Letters
DOI: 10.1016/j.epsl.2011.08.011


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